题目链接：http://exam.upc.edu.cn/problem.php?id=5122题目：题目描述Mapping applications often represent the boundaries of countries, cities, etc. as polylines, which are connected sequences of line segments. Si...
题目链接：http://exam.upc.edu.cn/problem.php?id=5083题目：题目描述You are working on the user interface for a simple text-based file explorer. One of your tasks is to build a navigation pane displaying the dir...
题目链接：http://exam.upc.edu.cn/problem.php?id=5206题目：题目描述From an evolutionary gene’s-eye perspective, the genes are immortal, and our role, the meaning of life, is to perpetuate the genes. In a few ce...